439128 has 64 divisors (see below), whose sum is σ = 1296000. Its totient is φ = 137376.

The previous prime is 439123. The next prime is 439133. The reversal of 439128 is 821934.

It is an interprime number because it is at equal distance from previous prime (439123) and next prime (439133).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is one of the 548 Lynch-Bell numbers.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (439123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4051 + ... + 4157.

It is an arithmetic number, because the mean of its divisors is an integer number (20250).

2⁴³⁹¹²⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 439128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (648000).

439128 is an abundant number, since it is smaller than the sum of its proper divisors (856872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

439128 is a wasteful number, since it uses less digits than its factorization.

439128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 131 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 439128 is about 662.6673373571. The cubic root of 439128 is about 76.0087709176.

The spelling of 439128 in words is "four hundred thirty-nine thousand, one hundred twenty-eight".